Aedui govtype Migration to Confederation

[srndiosp]

I look at export_descr_buildings and wonder if is it possible to upgrade Migration to Confederation government type in Aedui fraction.

As far as I understand this - we can upgrade to Migration in east celtic (1) and all non-celtic provinces (2) (quite logic, it is MIGRATION for west celts), as shown below:

aedui_mig requires factions { f_aedui, } and hidden_resource celtic and hidden_resource eastcelt
aedui_mig requires factions { f_aedui, } and not hidden_resource celtic

So when we have Migration government type we should be able to upgrade it to Confederation as below:

aedui_confed requires factions { f_aedui, } and hidden_resource celtic and hidden_resource gallic and not hidden_resource eastcelt and not hidden_resource belgic

But isn't that a bug? It tells that we have to have hidden_resource celtic. So, non-celtic provinces (2) are excluded. It also tells us that we cannot have hidden_resource eastcelt. And in that case east celtic (1) provinces are also excluded.

So when is it even possible? If never and it shouldn't be, why is this even written as possible upgrade for Migration?

[QuintusSertorius]

Not a bug at all, Migration governments are not for the "homeland", Confederations are only for the Aedui's homeland region in southern Gaul.

The upgrade for the Migration to Confederation shouldn't be there (but it doesn't work, so isn't causing any harm).